Device to detect the position of an iron

ABSTRACT

A device to detect an iron&#39;s position includes a constant voltage regulator, a frequency pick up unit, an integrated circuitry chip, a sensor unit and a control unit. The frequency pick up unit is connected to the constant voltage regulator. The frequency pick up unit includes a resistor connected to a capacitor to retrieve the frequency signal of the input voltage. The integrated circuitry chip includes a frequency producer connected with a frequency identifier. The sensor unit includes a metal ball disposed on an arc track to control the signal input of the frequency pick up unit. The control unit is connected to the frequency identifier. The frequency identifier triggers a signal to change the working mode of a transistor of the control unit.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a device to detect an iron's position, in particular to one that compares a frequency signal from an integrated circuitry chip with a frequency signal from an external power source to detect the position of the iron, and provides an arc track adapted for a metal ball to roll thereon to increase the sensitivity.

2. Description of the Related Prior Art

Many irons on market have installed with a safety device. Most of which are in an electrical conductor type, photoelectric sensing type, capacitor type or roller resistant type, such as the Taiwanese Patent No. 381727 titled “SAFETY CONTROL DEVICE FOR AN IRON”, which disclosed a roller resistant type as a safety control device. Another Taiwanese Patent No. 339787 titled “AN IRON WITH SAFETY CONTROL STRUCTURE” disclosed a photoelectrical conducting type, roller resistant type, and electrical conductor type. However, all of the above-mentioned safety control types require a large bead to roll on a flat and smooth surface which can not hold the bead firmly, thus, the sensitivity may be differed.

SUMMARY OF THE INVENTION

According to the present invention, there is provided a device to detect an iron's position, comprising:

-   -   a constant voltage regulator;     -   a frequency pick up unit connected to said constant voltage         regulator, said frequency pick up unit comprising a resistor and         a capacitor, said resistor being connected to said capacitor to         retrieve an input frequency signal;     -   an integrated circuitry chip connected to said constant voltage         regulator, said integrated circuitry chip comprising a frequency         producer and a frequency identifier, said frequency producer         being connected to said frequency identifier;     -   a sensor unit connected to said frequency pick up unit and said         integrated circuitry chip, said sensor unit comprising a metal         ball and an arc track, said metal ball being placed on said arc         track for controlling signal input of said frequency pick up         unit depending on the deviation of said metal ball sliding on         said arc track; and     -   a control unit connected to said frequency identifier of said         integrated circuitry chip, said control unit comprising a         transistor and a relay, said transistor being connected to said         relay, said frequency identifier triggering a signal to change         the working mode of said transistor to activate said relay.

Preferably, said constant voltage regulator comprises a resistor, a rectifier diode, a zener diode, and a capacitor, said resistor being connected to and said rectifier diode for restraining input voltage volume, said rectifier diode rectifying the input voltage, said zener diode limiting the input voltage, and said capacitor filtering the input voltage.

Preferably, said integrated circuitry chip further comprises a whistler.

Preferably, said integrated circuitry chip further comprises a light-emitting diode.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of the present invention; and

FIG. 2 is a circuitry of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

As shown in FIGS. 1 and 2, a preferred embodiment of the present invention comprises a constant voltage regulator 1, a frequency pick up unit 2, an integrated circuitry chip 3, a sensor unit 4 and a control unit 5.

The constant voltage regulator 1 comprises a resistor 11, a rectifier diode 12, a zener diode 13, and a capacitor 14. The resistor 11 is connected to the rectifier diode 12 in order to restraint voltage input as to protect the rectifier diode 12 from damaging if the voltage has a huge amount input, the voltage then through the rectifier diode 12 to output a stable voltage. If the input voltage is larger than predetermined collapsed voltage of the zener diode 13, the output voltage will be limited only the collapsed voltage preset to the zener diode 13, while the capacitor 14 will filter the voltage received from the zener diode 13 to delete unnecessary signal and output a stable voltage.

The frequency pick up unit 2 is connected to the constant voltage regulator 1 and comprises a resistor 21 and a capacitor 22. The resistor 21 and the capacitor 22 are connected in series to retrieve the frequency of the input voltage and transmit to the integrated circuitry chip 3.

The integrated circuitry chip 3 is connected to the constant voltage regulator 1 and comprises a frequency producer 31 and a frequency identifier 32. The frequency producer 31 produces a frequency and delivers the frequency to the frequency identifier 32. The frequency identifier 32 compares the frequency signal from the frequency producer 31 with the frequency signal from the frequency pick up unit 2. The integrated circuitry chip 3 further comprises a whistler 33 and a light-emitting diode (LED) 34 for alert notification.

The sensor unit 4 is connected to the frequency pick up unit 2 and the integrated circuitry chip 3, and comprises a metal ball 41 and an arc track 42. The sensor unit 4 detects the deviation of the metal ball 41 sliding on the arc track 42. This design provides a high sensitivity to detect the position of the iron.

The control unit 5 is connected to the integrated circuitry chip 3, and comprises a transistor 51 and a relay 52. When the transistor 51 is in a saturated status, a power source will be triggered to activate the relay 52.

To operate the present invention, as shown in FIGS. 1 and 2, the constant voltage regulator 1 inputs a voltage to the frequency pick up unit 2, and the frequency pick up unit 2 retrieves the frequency signal of the input voltage. The sensor unit 4 utilizes the deviation of the metal ball 41 sliding on the arc track 42 to sense the iron's position. The frequency signal of the input voltage is transmitted through the sensor unit 4 to the integrated circuitry chip 3. This frequency signal will be compared by the frequency identifier 32 with the frequency signal from the frequency producer 31 of the integrated circuitry chip 3. When the frequency identifier 32 identifies that the frequency producer 31 is producing a frequency signal different from the input frequency signal, the sensor unit 4 will be in an open status. The frequency identifier 32 transmits a signal to the control unit 5, which causes the transistor 51 in a saturated status to activate the relay 52. When the frequency signal from the frequency producer 31 is identified the same as of the frequency signal of the input voltage, the sensor unit 4 will be in a short circuit, and the frequency identifier 32 will transmit a signal to the control unit 5, which causes the transistor 51 in a working status to activate the relay 52, so that the iron can be detected in a straight or flat status to control the auto shut-down time when the iron is not in use. The arc track 42 of the sensor unit 4 provides the metal ball 41 to slide thereon and any change of the iron will cause the metal ball 41 to deviate on the arc track 42. This design provides a highly sensitivity of the sensor unit 4 to detect the position of the iron if it is in a straight or flat situation. 

1. A device to detect an iron's position, comprising: a constant voltage regulator; a frequency pick up unit connected to said constant voltage regulator, said frequency pick up unit comprising a resistor and a capacitor, said resistor being connected to said capacitor to retrieve an input frequency signal; an integrated circuitry chip connected to said constant voltage regulator, said integrated circuitry chip comprising a frequency producer and a frequency identifier, said frequency producer being connected to said frequency identifier; a sensor unit connected to said frequency pick up unit and said integrated circuitry chip, said sensor unit comprising a metal ball and an arc track, said metal ball being placed on said arc track for controlling signal input of said frequency pick up unit depending on the deviation of said metal ball sliding on said arc track; and a control unit connected to said frequency identifier of said integrated circuitry chip, said control unit comprising a transistor and a relay, said transistor being connected to said relay, said frequency identifier triggering a signal to change the working mode of said transistor to activate said relay.
 2. The device to detect an iron's position, as recited in claim 1, wherein said constant voltage regulator comprises a resistor, a rectifier diode, a zener diode, and a capacitor, said resistor being connected to and said rectifier diode for restraining input voltage, said rectifier diode rectifying the input voltage, said zener diode limiting the input voltage, and said capacitor filtering the input voltage.
 3. The device to detect an iron's position, as recited in claim 1, wherein said integrated circuitry chip further comprises a whistler.
 4. The device to detect an iron's position, as recited in claim 1, wherein said integrated circuitry chip further comprises a light-emitting diode. 